Hamper the perfidious Goth, that is (6)

I believe the answer is:

hogtie

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'hamper' is the definition.
Although both the answer and definition are verbs in their base form, I can't understand how they can define each other.

'perfidious goth that is' is the wordplay.
'perfidious' is an anagram indicator.
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'goth' anagrammed gives 'hogt'.
'hogt'+'ie'='HOGTIE'

'the' is the link.

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